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2012-04-20qcow2: Ignore reserved bits in get_cluster_offsetKevin Wolf3-19/+60
With this change, reading from a qcow2 image ignores all reserved bits that are set in an L1 or L2 table entry. Now get_cluster_offset() assigns *cluster_offset only the offset without any other flags. The cluster type is not longer encoded in the offset, but a positive return value in case of success. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-20qcow2: Save disk size in snapshot headerKevin Wolf2-0/+17
This allows that different snapshots of an image can have different sizes, which is a requirement for enabling image resizing even with images that have internal snapshots. We don't do the actual support for it now, but make sure that the additional field is present and not completely ignored in all version 3 images. When trying to load a snapshot of different size, it returns an error. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-20Specification for qcow2 version 3Kevin Wolf1-23/+99
This updates the qcow2 specification to cover version 3. It contains the following changes: - Added compatible/incompatible/auto-clear feature bits plus an optional feature name table to allow useful error messages even if an older version doesn't know some feature at all. - Configurable refcount width. If you don't want to use internal snapshots, make refcounts one bit and save cache space and I/O. - Zero cluster flags. This allows discard even with a backing file that doesn't contain zeros. It is also useful for copy-on-read/image streaming, as you'll want to keep sparseness without accessing the remote image for an unallocated cluster all the time. - Fixed internal snapshot metadata to use 64 bit VM state size. You can't save a snapshot of a VM with >= 4 GB RAM today. - Extended internal snapshot metadata to contain the disk size, so that resizing images that have snapshots can be allowed in the future. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-20qcow2: Fix refcount block allocation during qcow2_alloc_cluster_at()Kevin Wolf1-0/+6
Refcount block allocation and refcount table growth rely on s->free_cluster_index pointing to somewhere after the current allocation. Change qcow2_alloc_cluster_at() to fulfill this assumption. Without this change it could happen that a newly allocated refcount block and the allocated data block point to the same area in the image file, causing data corruption in the long run. This fixes a bug that became first visible after commit 250196f1. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-20Add .gitignore for tests/David Gibson1-0/+13
The new autotests in tests/ generate a number of files, both executable and source, which are not caught by the existing .gitignore files. This patch adds a new .gitignore in tests/ which covers these. [Changed 'rtc-test' to '*-test' so future tests do not need to be added to .gitignore on a case-by-case basis. Stefan] Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-20e1000: Fix spelling (segmentaion -> segmentation) in debug outputStefan Weil1-1/+1
This was reported by https://bugs.launchpad.net/qemu/+bug/984476. I also changed the case for 'error'. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-20spice-qemu-char.c: Show what name is unsupportedEduardo Elias Ferreira1-1/+1
Signed-off-by: Eduardo Elias Ferreira <edusf@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-20pflash_cfi01: remove redundant lineEric Bénard1-1/+0
Signed-off-by: Eric Bénard <eric@eukrea.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-20qxl: Add missing GCC_FMT_ATTR and fix format specifierStefan Weil2-2/+2
val is an uint64_t, therefore %d was not correct. Signed-off-by: Stefan Weil <sw@weilnetz.de> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-20fix block_job_set_speed name in documentationPaolo Bonzini1-2/+2
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-20error.c: don't return value for void functionAmos Kong1-1/+1
It is invalid to return a value from a function returning void. [C99 6.8.6.4 says "A return statement with an expression shall not appear in a function whose return type is void" but gcc 4.6.3 with QEMU compile flags does not complain. It's still worth fixing this. Stefan] Signed-off-by: Amos Kong <akong@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-20iotests: Resolve test failures caused by hostnameAndreas Färber1-1/+1
`hostname -s` may output an errror: hostname: Name or service not known This causes all tests to fail for `make check-block`. Suppress such error messages, letting the tests succeed. Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-20qemu-img: let 'qemu-img convert' flush dataLiu Yuan2-2/+3
The 'qemu-img convert -h' advertise that the default cache mode is 'writeback', while in fact it is 'unsafe'. This patch 1) fix the help manual and 2) let bdrv_close() call bdrv_flush() 2) is needed because some backend storage doesn't have a self-flush mechanism(for e.g., sheepdog), so we need to call bdrv_flush() to make sure the image is really writen to the storage instead of hanging around writeback cache forever. Signed-off-by: Liu Yuan <tailai.ly@taobao.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19sparc: fix qtestBlue Swirl1-1/+3
Initialize TCG only when enabled. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-19qtest: add dummy functions for user emulatorsBlue Swirl1-0/+18
Allow qtest to be used also in files used for user emulators by introducing dummy functions. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-19qtest: add register fuzzing to RTC testBlue Swirl1-0/+17
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-19qemu-ga: fix help outputMichael Roth1-3/+4
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2012-04-19qemu-ga: generate missing stubs for fsfreezeMichael Roth1-16/+20
When linux-specific commands (including guest-fsfreeze-*) were consolidated under defined(__linux__), we forgot to account for the case where defined(__linux__) && !defined(FIFREEZE). As a result stubs are no longer being generated on linux hosts that don't have FIFREEZE support. Fix this. Tested-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2012-04-19nbd: obey FUA on readsPaolo Bonzini1-0/+9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: do not include block_int.hPaolo Bonzini2-4/+3
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19aio: simplify qemu_aio_waitPaolo Bonzini1-69/+64
The do...while loop can never loop, because select will just not return 0 when invoked with infinite timeout. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19aio: return "AIO in progress" state from qemu_aio_waitPaolo Bonzini2-28/+22
The definition of when qemu_aio_flush should loop is much simpler than it looks. It just has to call qemu_aio_wait until it makes no progress and all flush callbacks return false. qemu_aio_wait is the logical place to tell the caller about this. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19aio: remove process_queue callback and qemu_aio_process_queuePaolo Bonzini9-64/+21
Both unused after the previous patch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19nbd: do not block in nbd_wr_sync if no data at all is availablePaolo Bonzini2-8/+44
Right now, nbd_wr_sync will hang if no data at all is available on the socket and the other side is not going to provide any. Relax this by making it loop only for writes or partial reads. This fixes a race where one thread is executing qemu_aio_wait() and another is executing main_loop_wait(). Then, the select() call in main_loop_wait() can return stale data and call the "readable" callback with no data in the socket. Reported-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: consistently return negative errno valuesPaolo Bonzini4-96/+93
In the next patch we need to look at the return code of nbd_wr_sync. To avoid percolating the socket_error() ugliness all around, let's handle errors by returning negative errno values. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: consistently check for <0 or >=0Paolo Bonzini3-43/+53
This prepares for the following patch, which changes -1 return values to negative errno. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: consistently use ssize_tPaolo Bonzini2-14/+12
GCC (pedantically, but correctly) considers that a negative ssize_t may become positive when casted to int. This may cause uninitialized variable warnings when a function returns such a negative ssize_t and is inlined. Propagate ssize_t return types to avoid this. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: avoid out of bounds access to recv_coroutine arrayPaolo Bonzini1-1/+5
This can happen with a buggy or malicious server. Reported-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19posix-aio: merge posix_aio_process_queue and posix_aio_readPaolo Bonzini1-28/+16
posix_aio_read already calls qemu_aio_process_queue, and dually qemu_aio_process_queue is always followed by a select loop that calls posix_aio_read. No races are possible, so there is no need for a separate process_queue callback. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qemu-tool: map vm_clock to rt_clockPaolo Bonzini1-2/+1
QED uses vm_clock timers so that images are not touched during and after migration. This however does not apply to qemu-io and qemu-img. Treat vm_clock as a synonym for rt_clock there, and enable it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qemu-io: use main_loop_waitPaolo Bonzini2-8/+9
This will let timers run during aio_read and aio_write commands, though not during synchronous commands. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19scsi: add SANITIZE commandPaolo Bonzini2-0/+2
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19SCSI emulation: should tell the guest that we actually support thin provisioningRonnie Sahlberg1-1/+1
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com> [Actually, we should report it only if discard_granularity is nonzero. Older SBC drafts assigned 0 to thin provisioning and 1 to thick (resource-provisioned, they call it). Newer drafts assign respectively 1 and 2 - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19SCSI emulation: Support unmap via WRITE_SAME_10.Ronnie Sahlberg1-2/+3
This was added in SBC r26 in place of the reserved bits that were present up to that version. It is the same as WRITE_SAME_16 as far as QEMU is concerned. Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: advertise DPOFUAPaolo Bonzini1-1/+2
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: small refactoring of MMC mode-sensePaolo Bonzini1-7/+12
Make DBD a boolean value, and force device-specific parameter to zero. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: support FUA on readsPaolo Bonzini1-10/+42
To force unit access on reads, flush the cache *before* doing the read. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: add a started field to SCSIDiskReqPaolo Bonzini1-0/+4
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: force unit access on VERIFYPaolo Bonzini1-4/+23
Also DMA data from the host, to avoid that the host reports an underrun. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19block: allow interrupting a co_sleep_nsPaolo Bonzini1-1/+2
In the next patch we want to reenter the coroutine from block_job_cancel_sync and cancel the timer. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qcow2: Fix return value of alloc_refcount_blockKevin Wolf1-1/+1
Someone forgot something in commit 29c1a730... Documenting the right return value is not enough, you also need to actually return it in the code. This bug sometimes causes error return values even when everything has succeeded: The new offset of the refcount block is truncated to 32 bits and interpreted as signed. At least with small cluster sizes it's easy to get a negative return value this way. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19qcow2: Fix error handling in qcow2_alloc_cluster_offsetKevin Wolf1-1/+1
If do_alloc_cluster_offset() fails, the error handling code tried to remove the request from the in-flight queue, to which it wasn't added yet, resulting in a NULL pointer dereference. m->nb_clusters really only becomes != 0 when the request is in the list. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19ide: convert ide_sector_write() to asynchronous I/OStefan Hajnoczi1-19/+42
The IDE PIO write sector code path uses bdrv_write() and hence can make the guest unresponsive while the I/O request is in progress. This patch converts ide_sector_write() to use bdrv_aio_writev() by using the BUSY_STAT bit to tell the guest that the request is in progress. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Tested-by: Richard Davies <richard@arachsys.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19ide: convert ide_sector_read() to asynchronous I/OStefan Hajnoczi2-21/+58
The IDE PIO interface currently uses bdrv_read() to perform reads synchronously. Synchronous I/O in the vcpu thread is bad because it prevents the guest from executing code - it makes the guest unresponsive. This patch converts IDE PIO to use bdrv_aio_readv(). We simply need to use the BUSY_STAT status so the guest knows to wait while we are busy. The only external user of ide_sector_read() is restart behavior on I/O errors and it is not affected by this change. We still need to restart I/O in the same way. Migration is also unaffected if I understand the code correctly. We continue to use the same transfer function and the BUSY_STAT status should never be migrated since we flush I/O before migrating device state. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Tested-by: Richard Davies <richard@arachsys.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qemu-io: Add command line switch for cache modeKevin Wolf1-1/+9
To be used as in 'qemu-io -t writeback test.img' Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19block: Fix spelling in comment (ineffcient -> inefficient)Stefan Weil1-1/+1
Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19iotests: fix error in 005Dong Xu Wang2-2/+2
According comment, we should not read again, we will write. Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19block: Drain requests in bdrv_closeKevin Wolf1-0/+2
If an AIO request is in flight that refers to a BlockDriverState that has been closed and possibly even freed, more or less anything could happen. I have seen segfaults, -EBADF return values and qcow2 sometimes actually catches the situation in bdrv_close() and abort()s. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19qemu-iotests: Test bdrv_close while AIO is in flightKevin Wolf3-0/+148
If the BlockDriverState is closed/freed without draining the AIO requests first, the request coroutines may work on invalid data and file descriptors or have some dangling pointers that cause segfaults. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19qemu-iotests: Always filter cluster_size out in _make_test_imgKevin Wolf11-127/+125
Some image formats do have a cluster size, others don't, but there are tests that work with both sets of images and currently we get failures because the qemu-img create output doesn't mention the cluster size for some formats. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
generated by cgit v1.1 at 2025-01-29 19:30:19 +0000